His hatred towards the foreigners was so intense that one time when a Spanish member of the infantry fell down from his horse, he gave him a glass of dirty water from the ditch as his drink.  The following day he was arrested, punished and was sentenced to death.  However, due to the insistent protest of the townspeople, the Provincial Governor was forced to interfere, thus, saving Mariano from sure death.

After a year he was again arrested when he was proven to be involved in an uprising.  He was put in solitary confinement with his neck and  feet chained to the wall of the cell and was given only one meal a day.  When he was transferred to Manila to be executed,  an order of his release was received  by the prison warden, so, he again escaped death the second time.